Characterization and Model of Piezoelectrochemical Energy Harvesting Using Lithium ion Batteries

Z. J. Schiffer, Craig B. Arnold

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Although lithium ion battery research often focuses on electrochemical properties, lithium ion intercalation materials are also mechanically active. Essentially, these materials exhibit a mechanical-electrochemical coupling such that when a stress is applied, the voltage of the battery increases. In this work, we develop a model to study and predict the effectiveness of intercalation materials as mechanical energy harvesters. Specifically, we show that a lithium ion battery harvester can be modelled as a simple circuit and that we can make both qualitative and quantitative predictions about the effectiveness of a battery material given its intrinsic mechanical and electrochemical properties. The measured efficiency of our system, calculated from the energy output and total work input, is 0.012 ± 0.004%, and our model predicts that the maximum theoretical efficiency of the system is 2.9 ± 0.5%. In the future, this model will help us develop and study other intercalation materials that will bring the measured efficiency closer to our proposed theoretical maximum.

Original languageEnglish (US)
Pages (from-to)605-611
Number of pages7
JournalExperimental Mechanics
Volume58
Issue number4
DOIs
StatePublished - Apr 1 2018

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • Lithium-ion batteries
  • Mechanical energy harvesting
  • Mechanical-electrochemical coupling
  • Piezoelectrochemisty

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